Print Java ArrayList: A Complete Guide
ArrayLists have been a trending topic in Java. They provide you with many more benefits than standard arrays. ArrayLists allow you to efficiently store objects in a row and clear them off when not needed. They also help you to…
Python ‘numpy.ndarray’ object is not callable Solution
Like any regular Python array, you can access the contents of a NumPy array using indexing. The indexing method, which uses square brackets, lets you see one item in a list or a particular part of a list. If you…
npm err! missing script: start Solution
If you have worked on JavaScript applications, you have seen and probably used Node.js. There are lots of tools in Node.js, and npm (node package manager) can help you manage them. npm installs the packages you want and provides a…
Python Check If List Is Empty
There are several ways to check if a list is empty. The first one covered below, if list returns as false, is the most pythonic. In other words, it is the one people recommend the most in Python. The other…
How to Learn NoSQL
When was the last time you sent a message through Facebook? Have you recently used a “smart” appliance at home? In both examples, databases are required to store information. NoSQL databases are commonly used in these cases. NoSQL, or “not…
Deep Dive: Roadmap to Coding Temple
The technology industry has seen exponential growth in the last decade and this trend is steadily heading toward a perpetual boom, especially now that all companies are becoming tech companies. Some quarters like LinkedIn even predicted an addition of around…
Boost Your Earning Potential in 100 Days with Udacity’s Business Nanodegrees
In 2011, a New York Times article dubbed business degrees as the "default major," backed by its soaring popularity in the United States. A case in point: one in every five undergraduate students major in business. Its popularity was attributed…
Elevate Your Software Engineering Career with Hack Reactor’s Professional Development Courses
Picture this: You’re a hiring manager with two software engineers standing in front of you. The one on the left is a recent graduate. She has the know-how on the latest technologies and tools in the industry. However, she doesn’t…
How an ISA Helped a Rock Musician Become a Software Engineer Amid Covid-19
For Daniel Michael, the realization that his life was about to seriously change hit almost as soon as Covid-19 entered the United States. “I’m a musician. Or at least I was before Covid,” he told us. The pandemic was spreading…
Java: Could Not Find Or Load Main Class
When working with Java, the final execution of code happens via pre-compiled classes. Once you write a class in Java, the compiler converts your high-level source code into a low-level scheme called bytecode. For each class that you write, an…
Getting Started with npm uninstall
With any well designed software, there must be a way to not only install the software, but to uninstall it from your machine. Node Package Manager, or npm, offers a simple command to achieve this. Using the npm uninstall command…
How to Learn Visual Studio
Are you interested in web development, specifically in using popular development platforms like .NET and ASP.NET and languages like C# and C++? If you’ve got some programming experience and want to tap into more advanced development features than a standard…
How to Learn .NET
If you’re looking for a developer platform that can help you create anything, from apps and games to Internet of Things applications, look no further than Microsoft’s .NET. .NET is a developer platform with tools, programming languages, and libraries for…
How to Solve java.lang.NullPointerException Error
You must have come across something called a NullPointerException if you have worked on Java-based applications. The Null Pointer Exception is one of the most common errors in Java application development. This exception is usually the result of a human…
What is Pseudocode?
Developers usually do not start writing code immediately after a big assignment. The issue with this approach is that the developer will have to think about how they go about completing the assignment as they go. In many cases, it…
Python Convert List to String: A How-To Guide
Suppose you are building an application that shows the grades a student has earned on a test. These grades are stored in a list but you want to present them as a string. How would you go about doing that?…
Python AttributeError: ‘numpy.ndarray’ object has no attribute ‘append’ Solution
In regular Python, you can use the append() method to add an item to the end of a list. You cannot use this method in NumPy. If you try to use the Python append() method to add an item to…
Git fatal: remote origin already exists Solution
The “origin” keyword is commonly used to describe the central source of a Git repository. If you try to add a remote called “origin” that already exists, you will encounter the “fatal: remote origin already exists” error. In this guide,…
Python Copy File: A How to Guide
You may need to copy a file in a number of programs. Imagine if you wanted to build a logging function for your program that begins with a predefined set of text. You could create a copy of an existing…
How to Use index.html
When you are building web pages in a code editor like Visual Studio Code, Sublime Text, you need to create an index.html because this page has an important job to do. Creating an index.html page first is considered a best…
npm command not found
Npm (node package manager) helps JavaScript developers focus on the code instead of other — sometimes tedious and repetitive — details. Sometimes, however, you may come across npm errors such as npm command not found. We will work through how…
How to Learn Electrical Engineering: Best Courses and Resources
Electrical engineers are the driving force behind many vital sectors like information, energy, and power. Because they stand at the forefront of practical technology, it's become more appealing than ever to learn electrical engineering. To break into an electrical engineering…
Python ValueError: math domain error Solution
In mathematics, there are operations which do not work on negative numbers or zero numbers. Consider the square root, for example. You cannot find the square root of a negative number. Python recognizes that not all operations work with negative…
Hadoop: Courses, Trainings, and Other Resources
Do you wonder how data in large applications like YouTube is managed? How is one video streamed to millions of devices at the same time? There is a format to process such data and a framework that helps in doing…
What is a GPU?
Have you ever wondered: how do graphics-intensive games get rendered on a computer screen? How does an entire Minecraft universe play so smoothly on a standard computer? What’s the key to high-definition video processing and editing? The answer to all…
What is FTP?
File Transfer Protocol, or FTP, is how files are transferred between computers on the Internet. It is a safe and reliable way to send files between users with access to the FTP server. FTP is also a common method for…
How to Learn Civil Engineering: Build Your Way to the Top
Civil engineers design the world from concept to completion. Their creations range from the buildings and roads that we see above ground to the plumbing and power cables that run below. If you want to know how these came to…
Python ValueError: list.remove(x): x not in list Solution
You cannot remove an item from a list if it does not appear in said list. The Python error ValueError: list.remove(x): x not in list tells you the item you want to remove does not appear in the list. In this…
Bash permission denied Explanation and Solution
Files on an operating system usually have permissions, making the file accessible to a limited range of people. For instance, some files on a computer are accessible only to administrators; other files are only accessible to a particular user. If…
Python JSONDecodeError Explanation and Solution
Many developers store data from a program in a JSON file; other programs reference APIs which require working with JSON. Indeed, you will have no trouble finding a use case for JSON, or its Python equivalent, dictionaries. You may encounter…
